Basin Length (Bottom): 54" (right to left measurement of the bottom of basin walls)

Basin Width (Top): 27-5/8" (back to front measurement of the top of basin walls)

Basin Length (Top): 45-11/16" (right to left measurement of the top of the basin walls)

Water Depth: 12-5/8" (depth of water at tub's maximum capacity)

Maximum Water Capacity: 60-gallons

Drain Location: Right

Variations On This Tub:

K-1100-RA: This model

K-1100-LA: This model with left-hand drain

About Kohler:

Gracious living is characterized by qualities of charm, good taste, generosity of spirit and the enhancement of nature. It is Kohler’s mission that you can improve your sense of gracious living with every experience you have with a Kohler product or service.

With everything that Kohler does it lives on the leading edge of design and technology, while maintaining a constant level of quality regardless of price. Kohler sets the standard of excellence in its field, and yet is constantly striving to improve.

From sustainable products in the kitchen and bath, to engines for lawn tractors and generators, to power systems that protect data centers and urban landscapes all over the world; this is what the Kohler Company is all about.

7 Questions from the Community

The Kohler recommends using a shower curtain with the K-1100-RA. They offer a number of curved rods to go with it, such as the K-9349, 9350, and the 9351.

Can this model tub fit for sliding glass shower doors?

A. The Kohler recommends using a shower curtain with the K-1100-RA. They offer a number of curved rods to go with it, such as the K-9349, 9350, and the 9351.

The Kohler K-1100-RA does not come in a cast iron version.

Is there a cast iron version of this tub?

A. The Kohler K-1100-RA does not come in a cast iron version.

The Kohler K-1100-RA can be used with or without a wall surround.

what surround will work with this tub?

A. The Kohler K-1100-RA can be used with or without a wall surround.

The Kohler K-1100-RA comes with the roughing in guide, which Kohler does not make available to us for distribution. Please refer to the Installation Guide pdf on the product page for the installation details.

Use a mortar base? What type of insulation? Rough-in dimentions?

A. The Kohler K-1100-RA comes with the roughing in guide, which Kohler does not make available to us for distribution. Please refer to the Installation Guide pdf on the product page for the installation details.

The Kohler K-1100-RA is going to be more straight up and down.

Does this bathtub have a lumbar support back or is it more straight up and down?

A. The Kohler K-1100-RA is going to be more straight up and down.

The Kohler K-1100-RA does not have a cast iron version of this tub.

Is there a cast iron version of this tub?

A. The Kohler K-1100-RA does not have a cast iron version of this tub.

The Kohler K-1100-RA can work with any spout that is wall mounted.

will this tub work with a standard spout?

A. The Kohler K-1100-RA can work with any spout that is wall mounted.

Product Reviews

Rated 1 out of
5 by
bored99 from
it cracked the first time I used it!Whoa! Tub was installed by a contractor (yes, it was level / he did a good job), and then it cracked the very first time I used it! Our best guess is that it's because the bathtub was relatively cold (room temperature, maybe 65ish) and then I put in hot water because I like warm baths.... and then it cracked! I don't know what Kohler was trying to design for, but a tub that can't handle hot water strikes me as patently absurd.

Date published: 2011-12-12

Rated 5 out of
5 by
countryliving from
After 2 months searchThe entire process was wonderful. Selected this bathtub after reviewing your website. Made a call to your customer service, Rep was super helpful. Communication was good all the way through the process. It arrived in a few days. It looks so nice - was actually just installed yesterday so my plumber was the slowest part of the process. Sorry, no picture yet because the area is finished.

Date published: 2010-04-30

Rated 3 out of
5 by
Louie Stavros from
Uniquely shaped tub, great for certain applications, but there are a few negatives.
I would only recommend this tub if you are designing your bathroom layout around it, as I did. It does provide a wider bathing area than most standard tubs, which is great for showering, but for baths it is probably more than needed because it just ends up taking more water to fill to the desired height. Downsides to this tub are mostly related to its acrylic composition. Ours had a surface crack on the floor area, very close to a vertical edge. We noticed this just after the installation was complete, so we don't know if it was damaged during the installation or if it was defective right out of the box. We have an estimate to repair for about $150 so this may not be a major long term issue. The other problem with acrylic is that the surface has a tacky feel to it. This surface texture is a big dirt collector and generally the tub always seems like its dirty. The unexpected issue we have with this tub is that the top edges are very narrow and are somewhat steeply ramped toward the inside of the tub. This leaves very little room for shampoo & soap bottles and when placed there, they tend to fall into the tub due to the ramped profile.

Date published: 2014-09-12

Rated 5 out of
5 by
Kurt1961 from
So coolI redid my kids bathroom. The alcove was 32" and I wanted to make full use of it for my two big weightlifting boys. This is dramatic, so cool. Couple it with the hydrorail system to transform your bathroom into a spa.

Date published: 2013-09-04

Rated 5 out of
5 by
CCinMD from
CCinMDAbsolutely love this tub! It was perfect for us. We wanted a bigger tub but were limited in space. This gave us exactly what we needed. It's a great soaking tub and fits just right. The plumber and the contractor both were quite impressed with it. I would definitely recommend this tub!

Date published: 2011-04-23

Rated 5 out of
5 by
busymom1 from
perfect soaking tubThis tub provides lots of room and looks great in a standard space. It is roomy especially if used with a curved shower rod.

Date published: 2010-10-02

Rated 5 out of
5 by
berbranon from
Coolest bathtub ever!If you like the radiused shower curtain roods you will love this bathtub. Fell like you have twice the space of a conventional sized tub plus the deep sides makes for a great bath as well. Looks awesome installed. Well worth the extra money.

Date published: 2010-07-03

Rated 5 out of
5 by
Bathroom Remodeler from
Good Service, Quality ProductI was pleased with the service I received when needing specs to see if this tub would fit in our new remodel. When it arrived it was clear the tub is good quality. Now that our remodel is finished I have been pleased with the size. It is bigger than an average tub but not so big to overwhelm the bathroom. Plenty of room for showering and bathing but not titanic.

Kohler

The Bold Look of Kohler is more than a slogan, it is a testament to the sight and focus of the Kohler company since the late 1800's. Kohler designs its plumbing fixtures and accessories for longevity and with a focus on pleasing your senses. Kohler’s attributes make its plumbing and accessories a clear choice of quality for generations to come.

Kohler Expanse Collection

The curved apron on the Kohler Expanse bath is a contemporary design aesthetic that truly adds functionality. Couple this unique bath with the Expanse curved shower rod to enjoy a truly comfortable bathing and shower experience within a traditional alcove installation. The Kohler Expanse collection allows most any standard alcove bathroom to be allowed the luxury spacious bathing.